Select the drop down selection in the FILE TYPE field to select the proper format. The available formats are:
MODEL DATA FORMAT: LS-DYNA, Nastran, Abaqus, Genesis, Moldflow, PamCrash, Radioss
CAD DATA FILE: IGES, LINE, VDA, DXF, CATIA, STEP, Unigraphics
SPECIAL MODEL FORMAT: ADAMS, ADAMS-Pre
A detailed description of each file import function is given in the following section.
Figure 5.6.2 File Format
A series of functions in this menu allow the user to read converted wireframe and surface data into DSI. The supported file formats include:
IGES (*.igs, *.iges), DSI (*.lin), VDA (*.vda), DXF (*.dxf), CATIA4 (*.model), CATIA5 (*.catpart), STEP (*stp,*.step), and UG (*.prt)
In order to provide flexibility in accepting line data from different CAD systems, DSI uses a neutral line data format to communicate with these CAD systems: IGES, PDGS standard, CGS (INCA and DES), DXF, etc. Once the user has entered the command, the files with the appropriate suffix will be listed in the options area. The user can then select the desired file.
DSI reads ABAQUS files directly with its built in translator. The DSI ABAQUS file extension is .inp.
This function allows the user to read both keyword and non-keyword LS-DYNA (.dyn) files directly into DSI. DSI supports versions 88 to 970 Keyword. Once the user has entered the command, the files with the suffix .dyn will be listed in the DSI FILE WINDOW. The user can then select the desired file.
This function allows users to read GENESIS (.dat) files directly into DSI. Once the user has entered the command, the files with the suffix .dat will be listed in the options area. The user can then select the desired file.
This function allows users to read MOLDFLOW data directly into DSI.
1. DSI prompts:
> READING MOLDFLOW INPUT FILE
> ENTER THE ROOT NAME OF THE MOLDFLOW INPUT FILES
2. After entering the root file name (assuming that the .mfl, .mod, and .tri files are available), DSI displays the MOLDFLOW model.
3. If the user is reading data into an existing model, DSI prompts:
> OFFSET NODE AND ELEMENT NUMBERS. (Y/N)
, YES renumbers the new data at the lowest available unused node/element number.
, NO compares the node/element numbers and ignores the duplicates -- DSI retains only the original nodes and elements (i.e., if the MOLDFLOW file contains all duplicate node and element numbers, the new part will read in with out the presence of elements or nodes).
4. DSI reads in the file and returns the user to the FILE MANAGER menu.
DSI uses NASTRAN as a file translator so that the user may import and export models and mesh. This function allows the user to read a NASTRAN bulk data file (.dat) directly into DSI. All existing properties, materials, and subcases are retained.
1. DSI displays the DSI FILE MENU and prompts:
> DEFINE NASTRAN BULK DATA FILE
2. DSI prompts:
> SELECT PART CONTROL OPTION FOR CBARS
The files with the suffix .nas will be listed for you in the options area.
MAT1 ID
, CBARS will be grouped by common MAT1 ID.
PBAR ID
, CBARS will be grouped by common PBAR ID.
PART NAME
, CBARS will be grouped by their individual part names.
3. If the user is reading data into an existing model, DSI prompts:
> OFFSET NODE AND ELEMENT NUMBERS. (Y/N)
, YES renumbers the new data at the lowest available unused node/element number.
, NO compares the node/element numbers and ignores the duplicates!DSI retains the only original nodes and elements (i.e., if the NASTRAN file contains all duplicate node and element numbers, the new part will read in without the presence of elements or nodes).
4. DSI reads in the file and returns the user to the FILE MANAGER menu.
This function allows the user to read a PAMCRASH (.pc) file directly into DSI. Once the user has entered the command, the files with the suffix .pc will be listed in the options area. The user may then select the desired file.
This function allows the user to read a RADIOSS data file directly into DSI. DSI can read fixed format input files from RADIOSS Versions 2.1, 2.2, 2.3, 3.1, and 4.1. DSI can write RADIOSS 4.1 fixed format input files. DSI supports all input cards of RADIOSS 4.1 fixed format. DSI contains options when reading RADIOSS input and output files. These options relate to the translation of rigid bodies to DSI and the loading of model information. RADIOSS requires two files to be loaded- one is the RADIOSS output file (.out), which contains the rigid body information. The second is the RADIOSS input file (.D00), which contains model information. If the user has both files, he should click YES at the first prompt to read both the RADIOSS output and input files. If the user has only the RADIOSS input file, the user should select NO.
1. Begin with reading the RADIOSS output file (.out). This loads the rigid body information. DSI will prompt:
> ADJUST RIGID BODY PRIMARY NODES FROM RADIOSS
OUTPUT. (Y/N)
, If YES is selected, the RIGID BODY information will be loaded with the output file. The user can then load the RADIOSS input file (.D00).
, If NO is selected, DSI will prompt:
>ADJUST RIGID BODY PRIMARY NODES BY DSI. (Y/N)
, YES will locate the RIGID bodies and recalculate the rigid body primary node locations.
, NO will finish the input sequence without modifying the model information.
DSI creates some default materials and element properties for elements that are lost during the file reading. These are assigned to the part DEFAU_#. DSI creates a node set, element set, material set, property set, and interface (contact) set for boundary conditions, interface, rigid walls, time history etc. DSI can read multiple RADIOSS input files into the same database.
Section J of the Appendix gives a complete description of converting ADAMS models to DSI. Please refer to that section when converting an ADAMS suspension.